将传入的NSStream转换为View

Question

我成功发送了一个NSData流.下面的委托方法是获取该流并附加到NSMutableData self.data.如何获取此数据并将其转换为UIView/AVCaptureVideoPreviewLayer(应显示视频)？我觉得我错过了另一个转换,AVCaptureSession> NSStream> MCSession> NSStream>？

- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode {
    switch(eventCode) {
        case NSStreamEventHasBytesAvailable:
        {
            if(!self.data) {
                self.data = [NSMutableData data];
            }
            uint8_t buf[1024];
            unsigned int len = 0;
            len = [(NSInputStream *)stream read:buf maxLength:1024];
            if(len) {
                [self.data appendBytes:(const void *)buf length:len];
            } else {
                NSLog(@"no buffer!");
            }

// Code here to take self.data and convert the NSData to UIView/Video
}

我用这个发送流:

-(void) captureOutput:(AVCaptureOutput*)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection*)connection
{

    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
    CVPixelBufferLockBaseAddress(imageBuffer,0);

    size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
//    size_t width = CVPixelBufferGetWidth(imageBuffer);
    size_t height = CVPixelBufferGetHeight(imageBuffer);
    void *src_buff = CVPixelBufferGetBaseAddress(imageBuffer);

    NSData *data = [NSData dataWithBytes:src_buff length:bytesPerRow * height];

    CVPixelBufferUnlockBaseAddress(imageBuffer, 0);


    NSError *error;
    self.oStream = [self.mySession startStreamWithName:@"videoOut" toPeer:[[self.mySession connectedPeers]objectAtIndex:0] error:&error];
    self.oStream.delegate = self;
    [self.oStream scheduleInRunLoop:[NSRunLoop mainRunLoop]
                            forMode:NSDefaultRunLoopMode];
    [self.oStream open];

    [self.oStream write:[data bytes] maxLength:[data length]];






//    CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer( sampleBuffer );

    CGSize imageSize = CVImageBufferGetEncodedSize( imageBuffer );
    // also in the 'mediaSpecific' dict of the sampleBuffer

    NSLog( @"frame captured at %.fx%.f", imageSize.width, imageSize.height );
}

Answer 1

您可以在处理事件时创建一个 UIImageView，如下所示：

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UIImageView * iv = [[UIImageView alloc] initWithImage: [UIImage imageWithData: self.data];

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您也可以只分配一次并调用 init。

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每次从套接字接收数据时，都会初始化 UIImageView，并且可以显示它将该 UIImageView 添加到 UIView。

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抱歉我的英语不好，我不知道我是否听懂了你的意思

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